package LeetCode.exercise;

public class LC69 {
    public static void main(String[] args) {
        LC69 lc69 = new LC69();
        System.out.println(lc69.mySqrt(2147395599));
    }
    public int mySqrt(int x) {
        if (x == 0) return 0;
        long left = 1, right = x;
        while (left < right) {
            long mid = left + (right - left + 1) / 2;
            if ((mid * mid) <= x) {
                left = mid;
            } else {
                right = mid - 1;
            }
        }
        return (int) left;
    }
}
